[RESOLVED] sudo broken?

[doubled]

Any use of sudo returns this error:

sudo: /etc/sudoers is mode 0640, should be 0440
sudo: no valid sudoers sources found, quitting

I'd like to chmod 0440 /etc/sudoers, but I must have root permissions. I saw that a user in the Ubuntu forums was able to use recovery mode from Grub, but no grub menu is visible at boot. And I cannot change the grub startup setting (so it will delay booting) without sudo.

Any assistance will be appreciated. Thanks.

[rfakhrai]

Re: sudo broken?

I believe the space bar or shift makes the GRUB menu show

after that, follow these directions. I can't vouch for them but it seems to be the common solution to this issue.

[doubled]

Re: sudo broken?

It's <Shift> that enables the GRUB menu. One of the recovery options was to drop to a root prompt. I changed the permissions on sudoers, and all is well.

Thanks for the help!